You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in flight ticket booking process from PHL to DEN?

ASSISTANT: I am happy to help you with your concern. Sure, can you please let me know your trip dates?

USER: Thank you for your response, I want to take off on Dec 20 and book my return ticket also on Dec 22.

ASSISTANT: Are you comfortable with direct flight or do you have any connection limit preference?

USER: I will prefer 1 break in between my journey.

ASSISTANT: Are you looking for any class preference?

USER: No.

ASSISTANT: Could you please let me know your airline preference?

USER: I am ok with any airline.

ASSISTANT: May I know, do you have any specific time concern for your journey?

USER: I am ok any time on that dates.

ASSISTANT: If you can help me with your name, I can proceed further to check with the flights availability.

USER: Sure, my name is Rebecca Perez.

ASSISTANT: Thank you for sharing all the required details, Rebecca Perez. It may take sometime, can you please hold for 2-3 minutes?

USER: Ok.

ASSISTANT: Your patience is appreciated, Rebecca Perez. Thank you for waiting.

USER: It's ok.

ASSISTANT: Sorry for the inconvenience, Rebecca Perez. Regret to inform that there is no flight available for the mentioned dates.

USER: Oh! It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us! Have a great day.