You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Frank Adams here. I need to book a flight ticket from OAK to ORD. Can you please help me with booking?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travelling dates are 07/14 and 07/16.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Sure, I will wait for your response.

ASSISTANT: Ok, there is a flight 1025 in Frontier airline matching your details with price 300. Shall I proceed?

USER: My price limit is 200, please recheck with that.

ASSISTANT: Ok, please hold on for a moment.

USER: Sure, I will wait.

ASSISTANT: Sorry to say, no flights were available within 200 on your route.

USER: Not a problem, thank you for the information.

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

USER: Thank you for your service.