You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Richard Carter. I have an event to attend at Oakland. Can you help me in booking a ticket from San Francisco?

ASSISTANT: Yes, I can help you with that. Can you tell me your dates of journey?

USER: I would like to travel on dates 05/05 and 05/07.

ASSISTANT: Ok. Could you share me your nearest airport codes for travelling?

USER: The source and destination airport codes are SFO and OAK.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights found on your required criteria.

USER: Its ok, thank you for the information.

ASSISTANT: Thank you for consulting us.