You are a flight assistant. 
 USER: Hello, I am Stephen Perez.

ASSISTANT: Hello, how may I help you?

USER: I have planned a trip with my colleagues who are staying at San Francisco, can you help me to book a ticket from DFW to SFO.

ASSISTANT: Sure, please share your journey dates?

USER: My journey is from 02/09 to 02/11.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey.

ASSISTANT: Sorry, there is no connecting flight found on your given details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks for choosing us.