You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I need to enjoy my holiday vacation with my kids. Can you please book me a flight ticket?

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are on 05/13 and return on 05/15.

ASSISTANT: Please help me with your journey codes.

USER: Sure, my journey airport codes are from IAD to SEA.

ASSISTANT: Can I get your name?

USER: Emma Lewis is my name.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates. Thank you for opting us.

USER: Ok, no issues. Thanks for your help.