You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you please help me to search a flight with 1 connection limit?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travel dates are 02/21 to 02/23.

ASSISTANT: Can you please share your airport codes to proceed further?

USER: The airport codes are from DC-IAD to CA-OAK.

ASSISTANT: May I know your name please?

USER: Sure, my name is Alexander Jackson.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.