You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you for the day?

USER: I am Linda Campbell. Meeting a family friend on his birthday, I have to go the place where they are staying at Chicago, ORD.

ASSISTANT: Ok.

USER: Help me to book a ticket under the price limit of 500.

ASSISTANT: Sure. Can I know your boarding airport code?

USER: My boarding point is Oakland, OAK.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: Kindly, share your travelling dates to proceed further.

USER: I have to fly on 01/28 and return date is on 01/30.

ASSISTANT: Thanks for sharing the details, give me a minute to check the flight availability.

USER: Take your time.

ASSISTANT: Thank you for waiting.

USER: Ok.

ASSISTANT: Unfortunately, there were no fights available with your requirements.

USER: Not a issue. Thank you for your response.

ASSISTANT: Thank you for approaching us.