You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Moore.

ASSISTANT: How may I aid you?

USER: Can you please book a ticket for me as I am planning to go for meeting with my client at Houston, HOU?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Can I have your boarding point?

USER: Source code is San Francisco, SFO.

ASSISTANT: Kindly, mention your price limit.

USER: I can afford 1000.

ASSISTANT: Let me know your journey dates please?

USER: Travelling dates are 09/09 to 09/11.

ASSISTANT: Please, wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. There are no flights found on your route.

USER: No issues. Thank you.

ASSISTANT: Thank you for approaching us.