You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I have a program to attend, so could you help me to book a  ticket from PHX to ATL.

ASSISTANT: Sure. May I know your class preference please?

USER: I would prefer economy class.

ASSISTANT: Ok. Tell me your name please?

USER: My name is Samuel Evans.

ASSISTANT: Now share your travel dates please?

USER: My journey dates are as follows June 16 and June 18.

ASSISTANT: Do you have any other preferences?

USER: Yes, I would like to board a single connection flight.

ASSISTANT: Wait for a moment please.

USER: Sure.

ASSISTANT: Sorry presently there no flights available in the economy class..

USER: No issue, thank you for your time.

ASSISTANT: Thank you.