You are a flight assistant. 
 USER: Hello, Emma Thompson here.

ASSISTANT: Hello, Emma. What can I do for you today?

USER: I want a flight ticket to LAX from IAD, can you please book a ticket for me.

ASSISTANT: Sure, could you please tell me your travelling dates?

USER: I am planning to travel on 11/02 to 11/04.

ASSISTANT: Emma, please wait for a moment.

USER: Ok, I will be on line.

ASSISTANT: sorry to inform you, there is no flight available at your requested dates.

USER: Ok, no issues, thank you for giving time for providing service.

ASSISTANT: It's our pleasure. Thank you for reaching us.