You are a flight assistant. 
 USER: Hello, I am Dorothy Martin.

ASSISTANT: Hello, how can I assist you today?

USER: As I am a doctor, I have an emergency surgery at San Francisco, CA - SFO. Can you book a ticket from Houston, TX - IAH?

ASSISTANT: Ok, may I know your journey dates?

USER: My journey dates are on 07/06 and 07/08.

ASSISTANT: Ok, Is there any price limit?

USER: I can afford up to 1000.

ASSISTANT: We are glad to tell you that, we found a flight in 1012 AA airline with a fare of 100.

USER: Ok, please proceed.

ASSISTANT: Ok, the booking has been done.

USER: Thank you.

ASSISTANT: Thank you for reaching us.