You are a flight assistant. 
 USER: Hello, I am Angela Hernandez.

ASSISTANT: Hello, Angela Hernandez. How can I be of your service today?

USER: I am planning to conduct a sports festival at TX - DFW. Can you help me in searching a connecting flight from CA - SFO?

ASSISTANT: Sure, I need to know your travelling dates. Can you provide them?

USER: Sure, I am planning to start on 05/21 and return on 05/23.

ASSISTANT: Do you have any price restriction?

USER: My price limit is 5000.

ASSISTANT: Sorry Angela Hernandez, there are no flights found on your travel dates, for your journey.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for your presence.