You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am David Davis.

ASSISTANT: How may I guide you today?

USER: I want to book a ticket from AUS to HOU to attend seminar, can you help me in booking?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: I am departing on Mar 07 and return on Mar 09.

ASSISTANT: Do you have any class preference?

USER: I am ok with any class.

ASSISTANT: Is there any connection limit?

USER: I need a flight with connection limit 1.

ASSISTANT: Do you have any specifications?

USER: I want to return in afternoon time.

ASSISTANT: I ma sorry to say that there is no flight found under your details.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.