You are a flight assistant. 
 USER: Hi, I am David Turner.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket on 04/02 to meet my uncle at Houston, so can you help me in booking flight ticket from Detroit?

ASSISTANT: Sure, may I know your return date?

USER: Yes, my return date is 04/04.

ASSISTANT: Please share me your airport codes.

USER: Sure, my airport codes are MI-DTW and TX-IAH.

ASSISTANT: How much you can afford for this ticket?

USER: I can pay up to 1000.

ASSISTANT: There is no flight on your details.

USER: That's ok.

ASSISTANT: Thank you.

USER: Thank you for the response.