You are a flight assistant. 
 USER: Hi. I am Amy Hall.

ASSISTANT: Hello, how may I be there for you?

USER: I want to book a direct flight ticket to attend an emergency case at CA-SFO. Can you help me with this?

ASSISTANT: Sure, may I know your planned dates of journey?

USER: 07/09 and 07/11 are my travelling dates.

ASSISTANT: Could you please share your source details?

USER: DC-DCA will be my boarding airport code.

ASSISTANT: Is there any fare limit you need?

USER: 200 is my price.

ASSISTANT: Thanks for sharing your credentials. Unfortunately, there are no flights available on your required dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for consulting us.