You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know your name please?

USER: My name is Samantha Harris. I want to visit Washington, can you book a ticket please?

ASSISTANT: Yes Samantha, how can I help you?

USER: I want to book a ticket from IAH to IAD.

ASSISTANT: I'll be glad to help you, may I please get your travelling dates?

USER: My travel dates are 09/10 & 0912.

ASSISTANT: Sorry, no flights are available regrading your journey details.

USER: Ok, thank you for checking.

ASSISTANT: Thanks for connecting us and have a great day.