You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Andrew Turner.

ASSISTANT: How may I assist you?

USER: I want to book a direct flight to attend an emergency case at NV-LAS. Can you help me?

ASSISTANT: Sure, I will help you. May I know your travel dates?

USER: 01/02 and 01/04 are my travelling dates.

ASSISTANT: Where would you like to leave from?

USER: OAK will be my source airport code.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1005. Shall I book this ticket?

USER: Yes you can .

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you so much.