You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Barbara Scott. I want to book a ticket from IAD to PHL, can you help me?

ASSISTANT: Sure, may I know your dates of journey please?

USER: My travel dates are 10/30 and 11/01.

ASSISTANT: Ok, please wait for a mean while.

USER: Sure.

ASSISTANT: Sorry Scott, there is no flight found under your travelling details.

USER: No problem, thanks for checking.

ASSISTANT: You are welcome.