You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Sharon Wilson here. I want to attend my office meeting. Can you book my ticket from HOU -LAX?

ASSISTANT: Sure, tell me your travel dates please?

USER: My journey dates are April 17-19.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for waiting. But I am sorry to say that there are no flights available.

USER: No issues, thank you for the information.