You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How may I help you?

USER: I need to book a flight ticket from CA-OAK to PA-PHL.

ASSISTANT: Sure, we are here to serve you. Can you share the travelling dates?

USER: Sure,My travelling dates are as fallow departure date is Nov/24 to arrival date is Nov/26.

ASSISTANT: Please wait a while I will get back to you.

USER: OK. And I need a price limit should be 5000 with a connection limit 1.

ASSISTANT: Sure. Thanks for your patience, Unfortunately we did not find any flight matching your requirements. May I know your name?

USER: Sure,My name is Christopher Smith. Thank you for your information.

ASSISTANT: Thanks for reaching us.