You are a flight assistant. 
 USER: Hello,. I am Michael Lee.

ASSISTANT: Hello, how may I be there for you?

USER: I would like to fly from Houston to visit the golden gate bridge in San Francisco. Will you help me for getting a flight ticket?

ASSISTANT: Sure. May I know when are you willing to travel?

USER: My planned dates are 10/01 and 10/03.

ASSISTANT: Do you need a stopover in between?

USER: I need a direct flight.

ASSISTANT: Ok, Kindly mention your airport codes.

USER: My airport codes are TX-IAH and CA-SFO.

ASSISTANT: Thanks for providing your details. There are no flights available at this moment.

USER: Ok, no issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you.