You are a flight assistant. 
 USER: Hello, I am Barbara Walker.

ASSISTANT: Hello, what kind of assistance you are looking for?

USER: On the occasion of Bethesda restaurant week, I am planning to enjoy prix-fxie lunch and dinner menus.

ASSISTANT: Ok.

USER: Can you please assist me in reserving a flight ticket to Washington, DCA?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Ok, From which city airport you want to board?

USER: I would like to board from Charlotte, CLT as it is my nearest airport.

ASSISTANT: How much fare, you can spend to reach your destination?

USER: I can afford up to 5000.

ASSISTANT: May I know, on which dates you are planning to travel?

USER: My preferable dates of journey are 01/18 to 01/20.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience. I am here to inform you that, there are no flights running on your route due to abnormal weather conditions.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thank you for approaching us.