You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Ashley Brown.

ASSISTANT: How may I assist you, Brown?

USER: My grandfather is suffering from some health problems, so he want to consult the specialist in Houston, IAH. Can you help me to book a flight ticket for him?

ASSISTANT: Sure, I will help him. May I know his source airport code please?

USER: Thank you for taking my request. He want to start his journey from the location HOU.

ASSISTANT: Please provide his journey dates.

USER: His appointment is about 10/18, so he should reach the destination in time, so the travelling dates are 10/17 and 10/19.

ASSISTANT: Please hold on a moment.

USER: Ok, take your own time and please provide him a comfortable flight.

ASSISTANT: Thank you for your patience, there is a flight for him with price 200 and in AA airlines. Can I proceed?

USER: I think this flight is comfortable to him, so please reserve a flight with name Ashley Brown.

ASSISTANT: Sure, his booking is confirmed with flight number 1006.

USER: I am  very happy for your service, thanks a lot.

ASSISTANT: Thank you for choosing us.