You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you help me in doing a reservation from OAK to IAD?

ASSISTANT: Can I know your travelling dates?

USER: My journey dates are May 24 to 26.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Can I know your name?

USER: I am Matthew Garcia.

ASSISTANT: Sorry, there is no flight with your travelling dates.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you.