You are a flight assistant. 
 USER: Hi, Donald Lee here.

ASSISTANT: Hello, how can I help you?

USER: I need to travel to Houston to enjoy Kemah boardwalk tour with my granny. Can you make a reservation with fare 500?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, I need to depart on 11/21 and 11/23.

ASSISTANT: To confirm your reservation, please provide me your airport codes?

USER: Sure, my boarding and landing points are from DTW to HOU.

ASSISTANT: Please wait for few minutes.

USER: Sure.

ASSISTANT: We found a 1019 AA airline with single connection and price of 100. Shall I proceed with booking?

USER: Yes, you can.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your service.

ASSISTANT: Thank you for reaching us.