You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Martinez.

ASSISTANT: How can I guide you today, Dennis?

USER: I am planning to visit New York, can you please book me a ticket from SEA to JFK?

ASSISTANT: Ok, can you please provide me your journey dates for better search?

USER: My planned dates of journey are from 05/20 to 05/22.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: There are no flights available with your preferences, Dennis.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for contacting us.