You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am David Lopez, can you assist me in booking a flight ticket from HOU to LAX?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: Ok, may I know if you can book on the date 03/04 and return date is 03/06.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting.

USER: That's ok, thank you for searching.

ASSISTANT: There are no flights available for your desired dates. Thank you for reaching us.

USER: Not a problem, thank you for information.