You are a flight assistant. 
 USER: Hi, I am Emma Jones.

ASSISTANT: Hello. How may I guide you today?

USER: I need a direct flight to OAK to enjoy Yosemite adventure with friends.

ASSISTANT: Sure, I will help you with that.

USER: Can you make a reservation with fare 200?

ASSISTANT: Can you please share your preferable journey dates?

USER: Sure, my journey dates are Nov 12 and Nov 14.

ASSISTANT: May I know your source code?

USER: Sure, my boarding point is LAS.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us, have a great day.