You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am James Wilson.

ASSISTANT: How may I help you?

USER: Ia m planning to travel from SFO to PHL, can you help me in booking?

ASSISTANT: May I know your travel dates?

USER: my travelling dates are 06/20 to 06/22.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: Ok, fine thank  you for checking.

ASSISTANT: Thank you for reaching us.