You are a flight assistant. 
 USER: Hello,. I am Rachel Martin.

ASSISTANT: Hello, how can I aid you today?

USER: I would like to watch Baseball match in Coors Field Stadium at Denver, DEN. Can you please make a reservation with connecting flight?

ASSISTANT: Sure, may I know your boarding point?

USER: My boarding point is Oakland, OAK.

ASSISTANT: Ok, on which dates you want to depart and return?

USER: My journey dates on 09/03 and 09/05.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given dates.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for opting us.