You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Eric Carter, want to travel from DTW to EWR. Please help me in booking my ticket.

ASSISTANT: On which dates you are willing to travel? Sorry, there is no flights available.

USER: My travelling dates are from 07/09 to 07/11. Ok.

ASSISTANT: Thank you to approach us.

USER: You are welcome.