You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me to book a flight ticket from PHL to BOS?

ASSISTANT: Sure, could you please mention with your dates of journey?

USER: My travelling dates are July 10 to July 12.

ASSISTANT: May I know your name please?

USER: Betty Wilson.

ASSISTANT: Are you expecting any other help from my side please?

USER: No.

ASSISTANT: Ok, wait for a mean while please.

USER: Sure.

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

USER: No problem, thank you.

ASSISTANT: You are welcome.