You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Jennifer Allen here. I want to travel from New York to Washington for attending an event. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I will help you out. May I know your travelling dates please?

USER: My departure date is 09/12 and return date is 09/14.

ASSISTANT: Can I know your airport codes too?

USER: My airport codes are from LGA to IAD.

ASSISTANT: Ok, please wait a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry, there are no flights found.

USER: Anyway, thank you for the information.

ASSISTANT: Thank you for reaching us.