You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Sarah Miller.

ASSISTANT: How may I assist you today?

USER: Could you help me to search a flight from SEA on 03/28? My return dates will be 03/30.

ASSISTANT: Sure, may I know your destination codes?

USER: I would like to visit my friends at OAK. Please search a flight with 1 connection.

ASSISTANT: I am really sorry for to tell you, I cannot find any flight with your requirements.

USER: That's fine. Thank you for your support.

ASSISTANT: It's my pleasure.