You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Paul Robinson.

ASSISTANT: How can I aid you today?

USER: Can you please book a flight ticket from JFK to IAD?

ASSISTANT: Sure, let me know your travelling dates?

USER: Sure, I need to travel on dates of 10/09 and 10/11.

ASSISTANT: Please be on hold for a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry to say this, there is no flight on your desired route.

USER: Oh! It is sad to hear. I need to choose another agency this time. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.