You are a flight assistant. 
 USER: Hi. I am Gary Hall.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from CO-DEN to CA-OAK. Can you help me?

ASSISTANT: Sure, we are happy to help you. Can you please mention your price limit?

USER: 5000 is my fare.

ASSISTANT: When would you like to make your journey?

USER: 08/27 and 08/29 are my travelling dates.

ASSISTANT: Ok, please wait for  a while.

USER: Ok.

ASSISTANT: We found a UA airlines with connecting flight of 1021 flight number and the fare of 100. Shall I proceed?

USER: Yes you can.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.