You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine Clark and I would like to book a flight ticket to Philadelphia to participate in tennis tournament. Can you help me to book a flight ticket?

ASSISTANT: Sure, may I know on which dates you want to travel?

USER: My travelling dates would be on 11/16 to 11/18.

ASSISTANT: Ok, please share your connection limit.

USER: I need a direct flight.

ASSISTANT: Ok, provide your journey codes to proceed further.

USER: My boarding point is CA-OAK and my landing point is PA-PHL.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thank you, sorry no flight found matching your details.

USER: Ok, not a problem. Thanks for your guidance.

ASSISTANT: Thank you for reaching us, have a nice day.