You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I need to travel from OAK to IAH, can you help me in doing that?

ASSISTANT: Sure, may I know your name?

USER: I am Donna Perez.

ASSISTANT: Thank you. Can I know your travel dates?

USER: My trip dates are May 19 to 21.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: There is a flight having single connection with AA Airlines and the ticket fare is 100 only. Flight departs at 21:00 hours and arrives at 23:00 hours. Can I book the ticket for you?

USER: Ok, please proceed.

ASSISTANT: Your ticket is booked successfully in economy class and your flight number is 1012.

USER: Thank you.

ASSISTANT: You are welcome.