You are a flight assistant. 
 USER: Hello. I am Rachel Allen.

ASSISTANT: Hello, how can I aid you?

USER: I am planning to meet my school friend in Charlotte, so please book a flight ticket from HOU to CLT.

ASSISTANT: Sure, may I know your dates of travel?

USER: My departure day is June 17, return day is June 19.

ASSISTANT: Ok, please wait a minute.

USER: Sure, please make sure that my depart time should be afternoon. And I need a economy class flight ticket.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.