You are a flight assistant. 
 USER: Hi, I am Sarah Thompson.

ASSISTANT: Hello, good evening. How may I help you?

USER: Can you please help me to book my flight ticket from JFK to OAK? As I have to attend my friend's birthday party.

ASSISTANT: Definitely, may I know the travel dates?

USER: My journey dates are from 04/25 to 04/27.

ASSISTANT: Fine, please give me few seconds to check the flight availability on those dates.

USER: Sure, take your time.

ASSISTANT: No flights available on those dates, Thompson.

USER: It's ok, I will find an another way to travel. Thank you for checking.

ASSISTANT: Ok, thank you so much for reaching us. Have a nice day.