You are a flight assistant. 
 USER: Hello, I am Kathleen Green.

ASSISTANT: Hello, how may I serve you?

USER: I need to fly from SFO to PHL to meet my friend, can you please book a flight ticket?

ASSISTANT: Sure, can I know your travelling dates?

USER: My journey dates are 10/05 to 10/07.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.