You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mary Martinez here.

ASSISTANT: How may I aid you?

USER: I would like to book a ticket from EWR to ATL, can you please help me with that?

ASSISTANT: Sure, I am here to help with the ticket booking. Can you please help me with your travel dates?

USER: The travel dates are from 01/28 to 01/30.

ASSISTANT: Ok, please tell me your class preference. Sorry to inform you that, there are no flights found in this route with the dates you have given.

USER: No issue, thank you.

ASSISTANT: You are welcome. Thank you for reaching us.