You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Justin Williams.

ASSISTANT: Nice to meet you Williams.

USER: Can you please book a flight ticket from SFO to JFK locations?

ASSISTANT: Sure, on which dates you want to travel?

USER: My travelling dates are from 12/24 and 12/26.

ASSISTANT: Sorry, I cannot find any flight with your travel dates.

USER: It's ok.

ASSISTANT: Thanks for contacting us.

USER: Thank you for spending time with me.