You are a flight assistant. 
 USER: Hello, I am Eric Philips. I want to book a ticket from Washington DC - IAD to New York, NY - JFK.

ASSISTANT: Hello,.

USER: Can you book me a ticket from May/01 to May/03?

ASSISTANT: Sure, Eric Philips. I will help you with booking a ticket. Thanks for your complete information of journey, please give me a moment.

USER: Ok.

ASSISTANT: Thanks for your patience. Sorry to inform that, there are no flights according to your required dates.

USER: Ok. Thanks for your response.

ASSISTANT: Thank you for choosing our agency.