You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking my flight ticket from IAD to SEA?

ASSISTANT: Sure, can you please let me with your dates of journey?

USER: My journey dates are from 02/09 to 02/11.

ASSISTANT: May I know your good name please?

USER: Myself Nicholas Taylor.

ASSISTANT: Do you have any other specifications please?

USER: I would like to prefer normal cost airline.

ASSISTANT: Please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: It's ok, thank you for your help.

ASSISTANT: You are welcome.