You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Andrew King here.

ASSISTANT: Nice to meet you Andrew.

USER: I want to bring my grand father to my house, so can you please help me in booking a ticket from ATL to OAK?

ASSISTANT: Sure King, can you please tell me the travel dates?

USER: My dates of journey is from 04/22 to 04/24.

ASSISTANT: Sure, please wait for a minute. Sorry King, I cannot find any flight with your request. Thanks for contacting us.

USER: That's ok.

ASSISTANT: It's my pleasure.