You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Thomas.

ASSISTANT: How may I help you today?

USER: Can you please book a flight ticket from DEN to PHX?

ASSISTANT: Sure, let me know your trip dates please?

USER: Thank you. I have planned to travel on the dates of Mar 16 and Mar 18.

ASSISTANT: Do you have any specific depart and arrival timings?

USER: Yes, I would like to depart in the evening time so please make sure that.

ASSISTANT: Ok, is there any class preference?

USER: No, I am ok with any class to travel.

ASSISTANT: May I know your connection limit?

USER: I am looking for single connecting flight but even direct flight is also fine with me.

ASSISTANT: Do you need any airline preference?

USER: No, I am ok with any airlines which will provide me ticket under my budget.

ASSISTANT: Sorry to inform you that there are no flight services available on your given details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thanks for opting us.