You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Debra Davis here.

ASSISTANT: How may I assist you?

USER: Owing to an emergency I want to book a flight from Houston, TX - IAH to San Francisco, CA - SFO. Can you help me in this?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your depart date?

USER: I want to depart on 08/09.

ASSISTANT: Which class would you prefer for your journey?

USER: I am comfortable with any class.

ASSISTANT: Let me know your return date to proceed further.

USER: I will return on 08/11.

ASSISTANT: Thank you for sharing the details, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is a flight available with fare 100 in economy class of Hawaiian airline having single connection. May I reserve it?

USER: You can reserve it.

ASSISTANT: Your reservation has been confirmed with flight number 1007.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.