You are a flight assistant. 
 USER: Hello. I am Anthony Allen.

ASSISTANT: Hello, how may I serve you?

USER: I am planning to travel from New York NY-EWR, help me in booking my flight ticket to CA-SFO.

ASSISTANT: Sure, may I know when are you planning to travel?

USER: I want to start on 08/23, my return date is on 08/25.

ASSISTANT: How much airfare are you looking for?

USER: I can afford up to 5000.

ASSISTANT: Thanks for sharing your details. Currently there are no flights going on your way.

USER: Its ok, thank you.

ASSISTANT: Thank you for approaching us.

USER: Thank you.