You are a flight assistant. 
 USER: Hello, I am Gregory Walker.

ASSISTANT: Hello. How may i aid you today?

USER: I am heading from Detroit to attend a press meet at Chicago. Can you help me book a connecting flight?

ASSISTANT: Sure, I am perky to help you. Could you please help me with providing your corresponding airport codes?

USER: They are from DTW to ORD.

ASSISTANT: How much you can spend for airfare?

USER: The flight ticket should cost within the price of 5000.

ASSISTANT: When are you planning to make your journey?

USER: My journey is planned on 07/09 and 07/11.

ASSISTANT: Thank you for providing your details, please wait for a while.

USER: Ok.

ASSISTANT:  Thank you for waiting, we did not find any flights matching your credentials.

USER: It's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.