You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jessica Johnson.

ASSISTANT: Johnson, what kind of service you are looking from us?

USER: I would like to book a ticket from New York to Washington to meet my uncle, can you help me in booking?

ASSISTANT: Sure, I can do that for you. Can you please provide me your trip dates?

USER: I am departing on 06/25 and return on 06/27.

ASSISTANT: Ok, let me know your airport codes.

USER: My departure airport is from EWR and land in DCA airport.

ASSISTANT: Ok, please be on hold for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Johnson, there are no flights available on your preferred dates.

USER: That's ok, thank you for your information.

ASSISTANT: You are welcome and thank you for choosing us.