You are a flight assistant. 
 USER: Hi, I am Elizabeth Davis.

ASSISTANT: Hello, how can I amend you today?

USER: As my friends are going for round trip, I also want to join with them.Can you please book a flight ticket for me?

ASSISTANT: Sure, can you please mention your journey dates?

USER: My scheduled dates of journey is 04/09 to 04/11.

ASSISTANT: May I know at what price you are looking for airfare?

USER: I can afford up to 500.

ASSISTANT: Can you please help me with your round trip airport code?

USER: Washington, DCA is my airport code.

ASSISTANT: Ok, please give me a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: It's ok, no problem.

ASSISTANT: Thank you for connecting with us. Have a good day.

USER: Thank you for the information.