You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How may I help you?

USER: I am planning to visit Museum of glass at Washington, can you please book a ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: My airport codes are from NV-LAS to DC-DCA.

ASSISTANT: Please help me with your travel dates.

USER: My planned dates of travel from 09/09 to 09/11.

ASSISTANT: Can I get your name?

USER: I am Stephanie Carter.

ASSISTANT: Please wait a moment.

USER: Ok.

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

USER: Ok, thank you for your information.

ASSISTANT: Thank your for reaching us.