You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in flight ticket booking process from PHX to LGA?

ASSISTANT: Can you share your trip dates?

USER: Thank you for your response, I want to take off on June 18 and book my return ticket also on June 20.

ASSISTANT: Do you need any connections?

USER: I will prefer direct flight.

ASSISTANT: Are there any other preferences?

USER:  No.

ASSISTANT: May I know your name?

USER: Sure, my name is James Campbell.

ASSISTANT: Sorry, there is no flight found with your details.

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

ASSISTANT: Thank you for reaching us.