You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking my flight ticket?

ASSISTANT: Yes, can you share me your dates of travel?

USER: My travelling dates are 01/08 and 01/10.

ASSISTANT: Ok, can I know your nearest airport codes?

USER: My nearest airport codes are PHL to IAD.

ASSISTANT: Give me a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates. Can I know your name for documentation purpose?

USER: Ok, please proceed with name Barbara Collins.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.