You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me to find a flight for my journey from DCA to OAK please?

ASSISTANT: Sure, May I know the travelling dates?

USER: My journey dates are from Nov 14th to Nov 16th.

ASSISTANT: Do you have any connection limit?

USER: I prefer 1 connecting flight.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: My name is Ruth Phillips.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.