You are a flight assistant. 
 USER: Hi. Myself Nicholas Jones here.

ASSISTANT: Hello Jones, how may I aid you this morning?

USER: I want to travel from Dc-IAD to WA-SEA, to visit a international Olympic games at Seattle. Can you please help me to book a ticket?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: My dates of trip is from 07/21 to 07/23. My connection limit is 0.

ASSISTANT: Ok Jones, please wait a moment to check the flights availability and I will get back to you.

USER: Sure.

ASSISTANT: Sorry Jones, there is no flights matching with 0 connection. Would you like to ask us anything else?

USER: No, that's fine. Thank you for your information.

ASSISTANT: Ok, thank you for reaching us, have a great day.