You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me to book a direct flight from CLT to PHX?

ASSISTANT: Sure. May I know your journey dates?

USER: My travelling dates are 23 and 25 of Jan.

ASSISTANT: Can I have your name?

USER: I am Jerry Hernandez.

ASSISTANT: Let me know your class preference.

USER: I prefer to travel in economy class.

ASSISTANT: Do you have any other specifications?

USER: I would like to return in the afternoon.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thank you for waiting, there were no flights available that  matches your requirements.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for approaching us.