You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Robert Lewis.

ASSISTANT: How can I assist you?

USER: I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 5000?

ASSISTANT: Sure, I can help you with that. May I know your willing dates to do journey?

USER: My travelling dates are 08/22 and 08/24.

ASSISTANT: Can you please help me with your airport codes?

USER: My travelling airport codes are from MCO to DTW.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: There are no flights available for you on those dates.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.