You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please book a flight ticket from OAK to IAD?

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are from July 19 to July 21.

ASSISTANT: Let m know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: I prefer normal cost airline to travel.

ASSISTANT: Can I have your name please?

USER: My name is Betty King.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.