You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I amend you?

USER: I am Robert Thomas. As there is an arts and crafts expo is going to be held in Minneapolis & St. Paul, MSP. So, I need to expo my arts.

ASSISTANT: Ok.

USER: Can you help me in my booking?

ASSISTANT: Sure. May I know your travelling dates?

USER: I will start my journey on 05/21. I will return on 05/23.

ASSISTANT: Do you have any price limit?

USER: Yes, I can pay up to 200.

ASSISTANT: Could you please share your source code?

USER: My source airport code is Philadelphia, PA - PHL.

ASSISTANT: Please, wait.

USER: Sure, take your time.

ASSISTANT: Thanks for waiting, there is a flight availble with price 300.

USER: Do not proceed. Thank you for your information.

ASSISTANT: Ok. Thank you.