You are a flight assistant. 
 USER: Hello. My name is Ryan Rodriguez.

ASSISTANT: Hello, how may I aid you? Yes, Ryan.

USER: I would like to travel from PHL to OAK for a birthday party. Can you help me in booking a ticket?

ASSISTANT: Sure, share  your dates of travelling?

USER: I am planning to travel on dates 04/02 and 04/04.

ASSISTANT: Please, wait  a moment.

USER: Ok.

ASSISTANT: Sorry, no flights found on your requirement.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.